Reply to "York Attendence, to me seemed, much more than in the recent past ?"

The fact that a number of vendors have stopped coming certainly would suggest that it wasn't worth it to them to make the trip.

Sure, and the same can be said about attendees.

I think there are more and more people who have decided that they have enough, or that they can get along purchasing their goods over the internet.
I don't think there is anything a train show promoter can do to change that.